Texas Instruments Universal Operational Amplifier EVM (Rev. A) User guide

Brand: Texas Instruments

Model: Universal Operational Amplifier EVM (Rev. A)

Type: User guide

Texas Instruments Universal Operational Amplifier EVM (Rev. A) is a comprehensive evaluation tool that empowers you to effortlessly assess the performance of various operational amplifiers.

With its versatile design, this EVM accommodates a wide range of op amp packages, including SOIC, TSSOP/MSOP, SOT23-5A, and SOT23-5B. This flexibility allows you to evaluate different op amps and configurations to determine the optimal solution for your specific application.

The EVM's intuitive layout simplifies circuit development, enabling you to construct various circuits such as voltage followers, non-inverting and inverting amplifiers, summing amplifiers, integrators, differentiators, and instrumentation amplifiers. The board's four separate circuit development areas provide ample space for experimentation and prototyping.

Texas Instruments Universal Operational Amplifier EVM (Rev. A) is a comprehensive evaluation tool that empowers you to effortlessly assess the performance of various operational amplifiers.

March 1999 Mixed-Signal Products

User’s Guide

SLVU006A

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

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iii

Chapter Title—Attribute Reference

Preface

Related Documentation From Texas Instruments

Amplifiers, Comparators, and Special Functions Data Book

(literature number SLYD011). This data book contains data sheets

and other information on the TI operational amplifiers that can be

used with this evaluation module.

Power Supply Circuits Data Book

(literature number SLVD002).

This data book contains data sheets and other information on the TI

shunt regulators that can be used with this evaluation module.

FCC Warning

This equipment is intended for use in a laboratory test environment only. It

generates, uses, and can radiate radio frequency energy and has not been

tested for compliance with the limits of computing devices pursuant to subpart

J of part 15 of FCC rules, which are designed to provide reasonable protection

against radio frequency interference. Operation of this equipment in other

environments may cause interference with radio communications, in which

case the user at his own expense will be required to take whatever measures

may be required to correct this interference.

Trademarks

TI is a trademark of Texas Instruments Incorporated.

Running Title—Attribute Reference

Chapter Title—Attribute Reference

Contents

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Design Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Power Requirements 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Board Layout 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Physical Considerations 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Area 100 – SOIC 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Area 200 – TSSOP or MSOP 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Area 300 – SOT23-5A 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 Area 400 – SOT23-5B 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Component Placement 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.7 Board Layout 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Example Circuits 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Schematic Conventions 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Sallen-Key Low-Pass Filter 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Sallen-Key High-Pass Filter 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Inverting Amplifier 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Noninverting Amplifier 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6 Two Operational Amplifier Instrumentation Amplifier 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7 Differential Amplifier 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference

Figures

2–1 Area 100 Schematic – SOIC 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Area 200 Schematic – TSSOP and MSOP 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 TLV22X1 Device Pinout 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 Area 300 Schematic – SOT23–5A 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 TLV2771 and TLV2461 Device Pinout 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 Area 400 Schematic – SOT23–5B 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–7 Universal Operational Amplifier EVM Board Component Placement 2-7. . . . . . . . . . . . . . . . .

2–8 Universal Operational Amplifier EVM Board Layout Top 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–9 Universal Operational Amplifier EVM Board Layout Bottom 2-9. . . . . . . . . . . . . . . . . . . . . . . . .

3–1 Sallen-Key Low-Pass Filter with Dual Supply Using Area 100 3-2. . . . . . . . . . . . . . . . . . . . . . .

3–2 Sallen-Key High-Pass Filter with Single Supply Using Area 200 3-4. . . . . . . . . . . . . . . . . . . . .

3–3 Inverting Amplifier with Dual Supply Using Area 300 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 Noninverting Amplifier with Single Supply Using Area 400 3-6. . . . . . . . . . . . . . . . . . . . . . . . . .

3–5 Two Operational Amplifier Instrumentation Amplifier with Single Supply 3-8. . . . . . . . . . . . . .

3–6 Single Operational Amplifier Differential Amplifier with Single Supply 3-9. . . . . . . . . . . . . . . . .

1-1

Introduction

This User’s Guide describes a universal operational amplifier (op amp)

evaluation module (EVM) that simplifies evaluation of surface-mount op amp.

Topic Page

1.1 Design Features 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Power Requirements 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Design Features

1-2

Introduction

1.1 Design Features

The evaluation module board design allows many different circuits to be

constructed easily and quickly. The board has four separate circuit

development areas that can be snapped apart and separated. Areas 100 and

200 are for dual op amps in the SOIC and TSSOP/MSOP packages. Areas 300

and 400 are for SOT23–5 single operational amplifier packages. A few

possible circuits are listed below:

Voltage Follower

Noninverting Amplifier

Inverting Amplifier

Simple or Algebraic Summing Amplifier

Difference Amplifier

Current-to-Voltage Converter

Voltage–to-Current Converter

Integrator/Low-Pass Filter

Differentiator/High-Pass Filter

Instrumentation Amplifier

Sallen-Key Filter

The EVM PCB is of two-layer construction, with a ground plane on the solder

side. Circuit performance should be comparable to final production designs.

1.2 Power Requirements

The devices and designs that are used dictate the input power requirements.

Three input terminals are provided for each area of the board:

Vx+ Positive input power for area x00 i.e., V1+ ⇒ area 100

GNDx Ground reference for area x00 i.e., GND2 ⇒ area 200

Vx– Negative input power for area x00 i.e., V4– ⇒ area 400

Each area has four bypass capacitors, two for the positive supply, and two for

the negative supply. Each supply should have a 1-µF to 10-µF capacitor for low

frequency bypassing and a 0.01-µF to 0.1-µF capacitor for high frequency

bypassing.

When using single supply circuits, the negative supply is shorted to ground by

bridging Cx02 or Cx06, and power input is between Vx+ and GNDx. The

voltage reference circuitry is provided for single supply applications that

require a reference voltage to be generated.

2-1

Evaluation Module Layout

This chapter describes and shows the universal op amp EVM board layout and

the relationships between the four areas.

Topic Page

2.1 Physical Consideration 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Area 100 – SOIC 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Area 200 – TSSOP or MSOP 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Area 300 – SOT23-5A 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 Area 400 – SOT23-5B 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Component Placement 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.7 Board Layout 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2

Physical Considerations

2-2

Evaluation Module Layout

2.1 Physical Considerations

The EVM board has four circuit development areas. If a specific area is

desired, it can be separated from the others by breaking along the score lines.

The circuit layout in each area supports an op amp package, voltage

reference, and ancillary devices. The op amp package is unique to each area

as described in the following paragraphs. The voltage reference and

supporting devices are the same for all areas. Surface-mount or through-hole

devices can be used for all capacitors and resistors on the board.

The voltage reference can be either surface mount or through hole. If surface-

mount is desired, the TLV431ACDBV5 or TLV431AIDBV5 adjustable shunt

regulators can be used. If through hole is desired, then the TLV431ACLP,

TLV431AILP, TL431CLP, TL431ACLP, TL431ILP or TL431AILP adjustable

shunt regulators can be used. Refer to Texas Instruments’

Power Supply

Circuits Data Book

(literature number SLVD002) for details on usage of these

shunt regulators.

Each passive component, resistor and capacitor, has a surface-mount 1206

foot print with through holes at 0.2″ spacing on the outside of the 1206 pads.

Therefore, either surface-mount or through-hole parts can be used.

Area 100 – SOIC

2-3

Evaluation Module Layout

2.2 Area 100 – SOIC

Area 100 uses 1xx reference designators, and is compatible with dual op amps

in 8-pin SOIC packages. Most dual op amps are available in this package. This

surface-mount package is designated by a D suffix in TI part numbers as in

TLV2422CD, TLV2342ID, TLV2252ID, etc. Refer to Figure 2–1 for a

schematic.

Figure 2–1.Area 100 Schematic – SOIC

C104 C103

C109 C110

V1+

V1–

V1+

GND1

V1–

Power Supply Bypass

–

V1+

V1–

R105

C112

R118

C105

R106

R107

R119

R108

R109

R117

C111

C106

A1OUT

1/2 Dual OP Amp

A101–

A102–

A103+

A104+

–

R104

C107

R112

C102

R103

R102

R111

R101

R110

R113

C108

C101

B1OUT

1/2 Dual OP Amp

B101–

B102–

B103+

B104+

R115

U102

R116

Voltage Reference

V1+

VREF1

U101a

U101b

R114

Area 200 – TSSOP or MSOP

2-4

Evaluation Module Layout

2.3 Area 200 – TSSOP or MSOP

Area 200 uses 2xx reference designators, and is compatible with dual op amps

in an 8-pin TSSOP or MSOP package. The TSSOP package is designated by

a PW suffix in TI part numbers as in TLV2422CPWLE, TLV2342IPWLE,

TLV2252AIPWLE, etc. The MSOP package is designated by a DGK suffix in

TI part numbers as in TLV2462CDGK. Refer to Figure 2–2 for a schematic.

Figure 2–2.Area 200 Schematic – TSSOP and MSOP

C204 C203

C209 C210

V2+

V2–

V2+

GND2

V1–

Power Supply Bypass

–

V2+

V2–

R205

C212

R218

C205

R206

R207

R219

R208

R209

R217

C211

C206

A2OUT

1/2 Dual OP Amp

A201–

A202–

A203+

A204+

–

R204

C207

R212

C202

R203

R202

R211

R201

R210

R213

C208

C201

B2OUT

1/2 Dual OP Amp

B201–

B202–

B203+

B204+

R215

U202

R216

Voltage Reference

U201a

U201b

V2+

VREF2

R214

Area 300 – SOT23-5A

2-5

Evaluation Module Layout

2.4 Area 300 – SOT23-5A

Area 300 uses 3xx reference designators, and is compatible with single op

amps in the 5-pin SOT-23 package with the pinout used for the TLV22X1 as

shown in Figure 2–3. This surface-mount package is designated by a DBV

suffix in TI part numbers as in TLV2211CDBV, TLV2221CDBV,

TLV2361CDBV, TLV2231IDBV, etc. Note: other parts like TLV2771CDBV,

TLV2711CDBV, TLV2461CDBV, etc., follow different pin-out schemes, which

are not compatible with this layout. See Figure 2–4 for a schematic.

Figure 2–3.TLV22X1 Device Pinout

IN+

–/GND

IN–

DD+

OUT

Figure 2–4.Area 300 Schematic – SOT23-5A

C304 C303

C309 C310

V3+

V3–

V3+

GND3

V3–

Power Supply Bypass

–

V3+

V3–

R305

C312

R318

C305

R306

R307

R319

R308

R309

R317

C311

C306

3OUT

301–

302–

303+

304+

R315

U302

R316

Voltage Reference

U301

V3+

VREF3

R314

Area 400 – SOT23-5B

2-6

Evaluation Module Layout

2.5 Area 400 – SOT23-5B

Area 400 uses 4xx reference designators, and is compatible with single op

amps in the 5-pin SOT-23 package with the pinout used for the TLV2271CDBV

and TLV2461CDBV as shown in Figure 2–5. This surface-mount package is

designated by a DBV suffix in TI part numbers as in TLV2771CDBV and

TLV2461CDBV. Note: earlier parts like TLV2221CDBV, TLV2231IDBV,

TLV2361CDB, and TLV2711CDBV, etc., follow a different pin-out scheme,

which is not compatible with this layout. Refer to Figure 2–6 for a schematic.

Figure 2–5.TLV2771 and TLV2461 Device Pinout

OUT

–/GND

IN+

DD+

IN–

Figure 2–6.Area 400 Schematic – SOT23-5B

C404 C403

C409 C410

V4+

V4–

V4+

GND4

V4–

Power Supply Bypass

–

V4+

V4–

R405

C412

R418

C405

R406

R407

R419

R408

R409

R417

C411

C406

4OUT

401–

402–

403+

404+

R415

U402

R416

Voltage Reference

U401

V4+

VREF4

R414

Component Placement

2-7

Evaluation Module Layout

2.6 Component Placement

Figure 2–7 shows component placement for the EVM board.

Figure 2–7.Universal Operational Amplifier EVM Board Component Placement

R101

C101

R102

R103

R104

C102

C103

C104

U101

C105

R105

R106

R107

C106

R108

R109

B104+

B103+

B102–

B101–

B1OUT

V1+

VREF1

GND1

V1–

A1OUT

A101–

A102–

A103+

A104+

R110

R111

C107

R112

R113

C108

R114

C109

C110

C111

R117

R118

C112

R119

R115

R116

U102

R317

C311

R309

R308

R319

C303

C306

C310

C305

R305

R307

C312

R306

R318

C304

C309

U301

UNIVERSAL OP AMP EVM

R219

C212

R218

R217

C211

C210

C209

R214

C208

R213

R212

C207

R211

R210

R216

R215

U202

R209

R208

C206

R207

R206

R205

C205

C204

U201

C203

C202

R204

R203

R202

C201

R201

A204+

A203+

A202–

A201–

A2OUT

V2–

VREF2

GND2

V2+

B2OUT

B201–

B202–

B203+

B204+

UNIVERSAL OP AMP EVM

TSSOP/MSOP SLOP120-2 1998

R417

C411

R409

R408

R419

C406

C410

C403

C405

R405

R407

R418

C412

R406

C409

C404

U401

R416

R415

U402

R414

VREF4

404+

403+

V4–

4OUT

V4+

GND4

402–

401–

R316

R315

U302

R314

VREF3

304+

303+

V3+

GND3

V3–

3OUT

302–

301–

Score Line

Area 100 – SOIC Area 200 – TSSOP/MSOP

Area 300 – SOT23-5A Area 400 – SOT23-5B

SOIC SLOP120-1 1998

UNIVERSAL OP AMP EVM UNIVERSAL OP AMP EVM

SOT23-5B SLOP120-4 1998SOT23-5A SLOP120-3 1998

Board Layout

2-8

Evaluation Module Layout

2.7 Board Layout

Figures 2–8 and 2–9 show the EVM top and bottom board layouts,

respectively.

Figure 2–8.Universal Operational Amplifier EVM Board Layout Top

Board Layout

2-9

Evaluation Module Layout

Figure 2–9.Universal Operational Amplifier EVM Board Layout Bottom

2-10

Evaluation Module Layout

3-1

Example Circuits

This chapter shows and discusses several example circuits that can be

constructed using the universal operational amplifier EVM. The circuits are all

classic designs that can be found in most operational amplifier design books.

Topic Page

3.1 Schematic Conventions 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Sallen-Key Low-Pass Filter 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Sallen-Key High-Pass Filter 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Inverting Amplifier 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Noninverting Amplifier 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6 Two Operational Amplifier Instrumentation Amplifiers 3–7. . . . . . . . . . .

3.7 Differential Amplifier 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Schematic Conventions

Figures 3–1 through 3–6 show schematics for a sampling of circuits that can

be constructed on the Universal Operational Amplifier EVM. The components

that are placed on the board are shown in bold and unused components are

blanked out. Jumpers and other changes are noted. These examples are only

a few of the many circuits that can be built on the EVM.

Chapter 3

Sallen-Key Low-Pass Filter

3-2

Example Circuits

3.2 Sallen-Key Low-Pass Filter

Figure 3–1 shows area 100 equipped with a dual operational amplifier

configured as a second-order Sallen-Key low-pass filter using dual-power

supplies.

Basic set up is done by proper choice of resistors R and mR, and capacitors

C and nC. The transfer function is:

OUT

1–

jQff

Where:

2 mn

And

m 1

Figure 3–1.Sallen-Key Low-Pass Filter with Dual Supply Using Area 100

C104 C103

C109 C110

V1+

V1–

V1+

GND1

V1–

Power Supply Bypass

–

V1+

V1–

R105

C112

R118

C105

R106

R107

R119

R108

R109

R117

C111

C106

A1OUT

1/2 Dual OP Amp

A101–

A102–

A103+

A104+

–

R104

C107

R112 C102

R103

R102

R111

R101

R110

R113

C108

C101

B1OUT

1/2 Dual OP Amp

B101–

B102–

B103+

B104+

R114

U102

R115

Voltage Reference

V1+

VREF1

U101a

U101b

R101

Jumper

–

mR R

Jumper

Not Used

out

1– (f/fo)

+ (j/Q)(f/fo)

fo =

2π √mn RC

Q =

√mn

m+1

0.1µF1µF

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Texas Instruments Universal Operational Amplifier EVM (Rev. A) User guide

Brand: Texas Instruments

Model: Universal Operational Amplifier EVM (Rev. A)

Type: User guide

Texas Instruments Universal Operational Amplifier EVM (Rev. A) is a comprehensive evaluation tool that empowers you to effortlessly assess the performance of various operational amplifiers.

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Texas Instruments Universal Operational Amplifier EVM (Rev. A) User guide

Texas Instruments Universal Operational Amplifier EVM (Rev. A) User guide

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